I passed all the other course that I took at my university, but I could never pass botany. This was why all botany students had to spend several hours a week in a lab look through a microscope at plant cells, and I could never see through a microscope. This was used to make my professor angry. “I can’t see everything, ” I said. Then he began patient enough to explain how to see through it, but I still couldn’t make it. At last we tried it with every adjustment of the microscope known to men. With my pleasure, I saw something and drew it quickly on the paper. “What’s that?” my professor asked. “That’s what I saw.” I answered. “No, you don’t!” he shouted, and he bent over and looking into the microscope. “That’s your eyes! You’ve fixed the lens so that it reflects! You’ve drawn your eyes!”

阅读下面短文, 掌握其大意, 然后从每题所给的 A , B , C , D四个选项中选出最佳答案。
It was a winter afternoon．Some friends and l were eating at a restaurant and talking．We talked and talked and soon   36  became the topic．Suddenly I   37  upon an idea．“Wouldn’t it be fun to go swimming ? Others go   38  in winter，but why couldn’t we ?   39  , we could be healthier if we did．”I told them about this , and they all said it was a good idea   40 .
Early the next morning , we four were standing at the bus stop，with bags in our hands  41   
for a bus to take us to the  42 ．The sky was clear；the sun was shining，but it was very cold all the same．  43 0ur heavy overcoats were not enough to keep us wall．We all felt we should go ___44__ but no one wanted to speak out .
We soon reached the sands．There was nobody there，but we were not discouraged．Instead we were   45  that we were the only ones that dared to challenge the weather．  46  we changed our clothes quickly．
But things were not going so  47 ．The freezing sea wind was blowing．We left very cold and  48 all over．At last we made up our minds to   49 into the water．We put our feet in first,   __50__ to take them back very quickly．The water was unbelievably cold．
Then I suggested we all jump in．We all went back ten steps .  I gave the  51 ，and we all rushed forward and jumped in．I shall never forget the moment I was in the water. I was up __52__and rushed again to the shore．So it was with my friends．We   53  0ur clothes as quickly as possible．
On the way back home，we talked about this unforgettable   54 ．The four of us did not __55____ school for the following three days．We all suffered a lot from a very bad cold，but we thought it was all worth it．

At last we reached a lonely village, _______ a beautiful river.

完形填空

　　Having passed what I considered the worst obstacle （障碍） , our spirits 1 . We made our way towards the left cliff （悬崖） . Where the going was better, though 2 steeper （steep陡峭） . Here we found 3 snow, as most of it seemed 4 blown off the mountain. We could see 5 mountains in the distance because 6 were forming all round us.

　　About one o'clock a storm 7 suddenly. We should have noticed its coming but we were concentrating on cutting steps and before we had time to do anything, we were 8 by snow. We could not move up or down and had to wait motionless , getting colder and colder. 9 my hood （兜帽） , my nose and cheeks were nearly frozen but I dare not 10 a hand out of my glove to 11 them.

　　After two hours of this, I realized we would have to do something to 12 being frozen to death. We stood up from time to time through the snow. I had 13 the outline of a buttress （扶垛）just above us. Our only 14 was to climb up to the buttress, and dig out a platform at the foot of it on which we could put up our 15 . We climbed to this place and started to cut away the ice. At first my companion seemed to regard this situation as 16 but gradually the wind died away and he 17 up. At last we made a platform big enough to pitch the tent , and we did this as best as we could. We 18 into our sleeping bags and fell asleep , 19 that we were lucky to be still 20 .

1．

[　　]

2．

[　　]

3．

[　　]

4．

[　　]

5．

[　　]

6．

[　　]

7．

[　　]

8．

[　　]

9．

[　　]

10．

[　　]

11．

[　　]

12．

[　　]

13．

[　　]

14．

[　　]

15．

[　　]

16．

[　　]

17．

[　　]

18．

[　　]

19．

[　　]

20．

[　　]

At last we reached a lonely village, _______ a beautiful river.

A．in front of it lay                         B．in front of which lay

C．in front of it laid                         D．in front of which lied